Ridgefield, CT (WFSB) -- A 15-month-old boy died after police said his father left him unattended in a motor vehicle that was parked at his place of employment in Ridgefield on Monday.

Police said they were notified by staff at Danbury Hospital at 6 p.m. after the unidentified father drove the child there. No 911 calls were made to police.

The child was left in the unattended vehicle for what police said was an "extended period of time," but the exact time is unknown.

The Office of the Chief Medical Examiner has not determined the infant's cause of death and the cause is listed as pending, police said.

Police would not say whether anyone was facing charges. Though the father's name was not released, police said the family resides in Ridgefield.

The State Police Western District Major Crime Unit and the Danbury State's Attorney's Office are assisting the Ridgefield Police Department with the case.

Officials from the Department of Children and Family were notified about the incident, but could not confirm the family's identity. DCF officials said they have opened a case on the incident based on information provided by police.

DCF officials said there was no prior involvement with the family, who is believed to be from Ridgefield.

Within the last month, six Connecticut caretakers have been charged with leaving children in unattended vehicles.

On Tuesday, three cases of children being left in hot cars were reported.

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